When analytics forecasting is setup (see article 'How to setup analytics forecasting for a sensor'), it becomes possible to view the forecast for the next hour and day in the sensor detail data. To do this, click the button Forecast' in the right top corner of the graph.
When you enable forecasting, the graph will be extended by one hour/day (depending which period of time is selected for the graph) with the forecasted data flow.
Note: this is currently only possible for the 'Line graph' view.
In the innius insight for Android it is also possible to view the forecast by enabling the forecast setting below the sensor detail graph: